/** Class to manage a locale identifier using the BCP 47 `language`-`country` format. */
export declare class Locale {
    /** The ISO 639-1 alpha-2 language code. */
    readonly languageCode: string;
    /** The ISO 3166-1 alpha-2 country code. */
    readonly countryCode: string;
    /** The locale identifier using the BCP 47 `language`-`country` case-normalized format. */
    readonly identifier: string;
    /**
     * Create a new `Locale` object.
     *
     * @param identifier - A locale identifier using the BCP 47 `language`-`country` format (case insensitive).
     *
     * @throws An error if the `identifier` format is invalid.
     */
    constructor(identifier: string);
}
export declare class LocaleList {
    /** A set of ISO 639-1 alpha-2 language codes. */
    readonly languages: Set<string>;
    /** A set of ISO 3166-1 alpha-2 country codes. */
    readonly countries: Set<string>;
    /** A set of locale identifiers using the BCP 47 `language`-`country` case-normalized format. */
    readonly locales: Set<string>;
    /** A list of locale objects. */
    readonly objects: Locale[];
    /**
     * Create a list of locale identifiers.
     *
     * @param locales - An set of unique locale identifiers using the BCP 47 `language`-`country` format (case insensitive).
     *
     * @throws Will throw an error if one of the locale's format is invalid.
     */
    constructor(locales: Set<string>);
}
/**
 * Is a given string a locale identifier following the BCP 47 `language`-`country` format.
 *
 * @param identifier - A potential locale identify to verify.
 * @param caseNormalized - Should we verify if the identifier is using the case-normalized format?
 */
export declare const isLocale: (identifier: string, caseNormalized?: boolean) => boolean;